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Fixed inner and outer rings (NAU)

In double-row cylindrical roller bearings, the designation NAU refers to a bearing with fixed inner and outer rings.

  • N → Cylindrical roller bearing

  • A → Double-row design

  • U → Both inner and outer rings have ribs, so they are axially fixed

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When to choose an NAU bearing

Choose NAU if you need:

  • High radial load capacity

  • Axial location of the shaft

  • Compact, stiff bearing arrangement

  • No axial displacement within the bearing

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US